[FFmpeg-trac] #5978(avformat:new): FFprobe calculates timecode wrong with mp4 ntsc framerates

FFmpeg trac at avcodec.org
Fri Nov 25 12:27:02 EET 2016

#5978: FFprobe calculates timecode wrong with mp4 ntsc framerates
             Reporter:  haze.ortner   |                    Owner:
                 Type:  defect        |                   Status:  new
             Priority:  normal        |                Component:  avformat
              Version:  git-master    |               Resolution:
             Keywords:  timecode mov  |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |

Comment (by haze.ortner):

 Replying to [comment:7 cehoyos]:

 > How can we rule out that they all read the timecode wrong?
 I did a spreadsheet with 4 different test files and synced them manually
 against the audio that I recorded with a SoundDevices 633 which was on the
 same clock. Then I noted the data, and most times they were straight on or
 of by a frame. And since I filmed the actual timecode I can see that those
 programs shows the same timecode that's in the picture.

 > Files with other timecode framerates may help.

Ticket URL: <https://trac.ffmpeg.org/ticket/5978#comment:8>
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